Across
- 2. evidence of past life on Earth
- 4. type of adaptation building nests is
- 6. species evolving together
- 9. studied finches in the Galapagos
- 10. evolution type where species become less alike
- 11. new species forming from a common ancestor
- 12. evolution type where species become more alike
- 13. survival of fittest
Down
- 1. structure with no current function
- 3. evolution occurring slowly over time
- 5. change over time
- 7. thick fur and sharp teeth adaptation type
- 8. similar structures in unrelated species
- 9. what Darwin never knew that is a key to evolution